US20020130462A1 - Device for conveying sheets - Google Patents

Device for conveying sheets Download PDF

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Publication number
US20020130462A1
US20020130462A1 US10/080,256 US8025602A US2002130462A1 US 20020130462 A1 US20020130462 A1 US 20020130462A1 US 8025602 A US8025602 A US 8025602A US 2002130462 A1 US2002130462 A1 US 2002130462A1
Authority
US
United States
Prior art keywords
rollers
conveyor belt
sheet
conveyor belts
surface coating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/080,256
Other languages
English (en)
Inventor
Dirk Dobrindt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NexPress Solutions LLC
Original Assignee
NexPress Solutions LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NexPress Solutions LLC filed Critical NexPress Solutions LLC
Assigned to NEXPRESS SOLUTIONS LLC reassignment NEXPRESS SOLUTIONS LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DOBRINDT, DIRK
Publication of US20020130462A1 publication Critical patent/US20020130462A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/02—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains
    • B65H5/021—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts
    • B65H5/023—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts between a pair of belts forming a transport nip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2401/00—Materials used for the handling apparatus or parts thereof; Properties thereof
    • B65H2401/10—Materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/22—Cross section profile
    • B65H2404/222—Flat belt
    • B65H2404/2221—Flat belt wider than width of transported material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/23—Belts with auxiliary handling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/25—Driving or guiding arrangements
    • B65H2404/255—Arrangement for tensioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/26—Particular arrangement of belt, or belts
    • B65H2404/261—Arrangement of belts, or belt(s) / roller(s) facing each other for forming a transport nip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/50—Surface of the elements in contact with the forwarded or guided material
    • B65H2404/53—Surface of the elements in contact with the forwarded or guided material with particular mechanical, physical properties
    • B65H2404/531—Surface of the elements in contact with the forwarded or guided material with particular mechanical, physical properties particular coefficient of friction
    • B65H2404/5311—Surface with different coefficients of friction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/50—Surface of the elements in contact with the forwarded or guided material
    • B65H2404/55—Built-up surface, e.g. arrangement for attaching the surface to the forwarding or guiding element
    • B65H2404/551—Non permanent attachment, i.e. allowing interchange ability of the surface
    • B65H2404/5513—Strip-shaped built-up surface

Definitions

  • This invention relates to a device for conveying sheets through a printing machine.
  • the safe transport of the sheet is especially jeopardized for small sheet formats, especially at the transfer areas between two belt systems, and for directional changes of a sheet path, for example during the transfer from a vertical to a horizontal sheet path.
  • a possibility for safeguarding the transport path of the sheet is guiding the sheet on path distances on the tension rollers that are as long as possible, i.e. increasing the number of the tension rollers in the printer.
  • a second possibility is increasing the coefficients of friction of the surfaces of the conveyor belts and in this way, increasing the certainty of the transport of the sheet.
  • the mentioned second possibility is disclosed in the patent WO96/10778, which describes an improved separation coating for use in many elastomer structures, for example, printing rollers and belts.
  • the coating includes a thin, stretched polytetrafluoroethylene skin attached to a substrate, with a permeable surface and an impermeable area that is exposed as a contact surface.
  • This usage of two surfaces on a single thin coating makes available on the one hand, an excellent bonding with the substrate material, e.g. a silicon elastomer layer, and is on the other hand, highly insensitive to wear, and insensitive to chemical influences.
  • the first possibility is the high material and structural component requirement and as a result, a higher maintenance susceptibility.
  • the second possibility is a multiple layer construction, whose manufacture requires many operating steps.
  • the purpose of the invention is to produce a device for conveying sheets through a printing machine, which ensures the safe transport of the sheet exactly in the transport path provided, at a low material expense.
  • a device for conveying sheets through a printing machine having continuous conveyor belts running over deflection rollers, between which the sheets are held by frictional forces and guided one after the other.
  • rollers are provided which press the conveyor belts against each other along the conveyance path, whereby the contact surfaces of the conveyor belts with the sheet have a surface coating made of a material with a high coefficient of friction relative to the material of the sheet.
  • the surface coating can be made out of silicone.
  • At least one cleaning device is assigned to the conveyor belts.
  • This cleaning device can contain set cleaning rollers.
  • at least one of the rollers that are present, which press the conveyor belts against each other along the conveyor path, can be constructed as a cleaning roller.
  • the surface coating of the contact surfaces has a surface that is anti-soiling.
  • each module of the conveyor belt lying above is constructed shorter than the conveyor belt lying below, whereby the number of the rollers allocated to the upper conveyor belt is reduced by one relative to the number of the rollers allocated to the conveyor belt lying below.
  • the deflection rollers of the conveyor belt lying above act as tension rollers and each are arranged between the deflection roller of the conveyor belt lying below and the roller adjacent to the deflection roller of the lower conveyor belt.
  • the surface coating can be constructed only in partial areas of the contact surface of the conveyor belt with the sheet. In this way, a material savings is obtained based on the physical phenomenon that the frictional force is independent of the size of the contact area. Furthermore, the surface coating can be constructed advantageously in a strip shape or in the form of separate islands.
  • FIG. 1 is a schematic diagram of two sections of conveyor belts of a printing machine with a sectional surface coating according the invention made of a material with a high coefficient of friction;
  • FIG. 2 is a schematic side view of a paper path in a printing machine with deflection rollers and cleaning rollers.
  • FIG. 1 shows, in an exemplary manner, a section of a conveyor belt 10 and a section of another conveyor belt 15 of a printing machine. Visible on the conveyor belt 15 , a surface coating 20 made of a material with a high coefficient of friction relative to the material of the sheet has been applied in sections to the shaded areas on this side of the conveyor belt 15 .
  • the conveyor belt 15 transports, on its upper side, the sheet 5 in the direction of the arrow a.
  • a roller 30 is arranged below the section of the conveyor belt 15 .
  • Another continuous conveyor belt 10 is arranged above the section of the conveyor belt 15 , and above this, another roller 30 is arranged.
  • the rollers 30 function for the so-called interlacing of the conveyor belts 10 and/or 15 .
  • FIG. 1 a section of the conveyor belt 10 is shown in FIG. 1.
  • This conveyor belt moves in the direction of the arrow a, i.e. in the same direction as the section of the conveyor belt 15 .
  • Both conveyor belts 10 , 15 are continuous.
  • the force F 2 acts by the pressure force of the lower roller 30 from below
  • the force F 1 acts by the pressure force of the upper roller 30 from above.
  • the conveyor belts 10 , 15 are driven by a motor (not shown) in the directions of the curved arrow b, whereby the lower and upper roller 30 run in opposite directions.
  • the rollers 30 are shown set apart at a distance for clarity in this diagram according to FIG. 1, but in operation, the rollers 30 are arranged adjacent to each other, and press the conveyor belts 10 , 15 between them.
  • the sheet 5 between the rollers 30 at the nip i.e. the respective support surface of a roller
  • the rollers 30 are depicted in FIG. 1 as circles in a side view for illustrative purposes, but they have, as usual, approximately a length corresponding to the width of the conveyor belts 10 , 15 plus a width indicated as an overhang.
  • the rollers 30 are constructed to be crowned; i.e., the circumference of the respective rollers 30 is larger in their middle than on their edge.
  • the conveyor belts 10 , 15 with the sheet 5 are moved in the direction indicated by the straight directional arrow a.
  • the sheet 5 is held essentially by frictional forces on the conveyor belts 10 , 15 and secured from slipping on the conveyor belts 10 , 15 .
  • sections of a surface coating 20 are applied onto the conveyor belts 10 , 15 . In FIG. 1, these are shown by strips running along the conveyor belts 10 , 15 .
  • the surface coating 20 is located, as shown in FIG. 1, on its upper side, on which the sheet 5 lies.
  • the surface coating [not shown] is located, in this diagram according to FIG. 1, on the underside that faces the sheet 5 .
  • the material with the high coefficient of friction relative to the material of the sheet 5 is in this case silicone, an organic compound of silicon with oxygen or carbon.
  • silicone is especially suitable as a surface coating for conveyor belts 10 , 15 .
  • a few properties in relation to the invention are the flexibility, extensibility, and gripping capacity.
  • FIG. 2 shows in a schematic diagram essential parts of the device for conveying sheets 5 through a printing machine with an arrangement of rollers 30 and deflection rollers 35 .
  • a continuous conveyor belt 10 is allocated to the upper rollers 30 and deflection rollers 35
  • a continuous conveyor belt 15 is allocated to the lower rollers 30 and deflection rollers 35 .
  • the two deflection rollers 35 per respective conveyor belt 10 , 15 are each a roller with motor drive for moving the conveyor belts 10 , 15 and a tension roller set opposite it.
  • the conveyor belt 10 is tensioned around the upper roller 30 and deflection rollers 35 and the conveyor belt 15 is tensioned around the lower rollers 30 and deflection rollers 35 , and these move in the directions indicated by the directional arrows.
  • the surface coating 20 made of a material with a high coefficient of friction relative to the material of the sheet 5 and the sheet 5 are not shown in FIG. 2.
  • the conveyor belts 10 , 15 are each moved in a circular progression around the deflection rollers 35 acting on them by a drive of one of these deflection rollers 35 .
  • the rollers 30 function for the so-called interlacing of the conveyor belts 10 , 15 and exert the forces F 1 and F 2 on the conveyor belts 10 and/or 15 .
  • the frictional forces are effective between the conveyor belts 10 , 15 and the sheet 5 so that the sheet 5 resting on the conveyor belts 10 , 15 is moved corresponding to the conveyor belts 10 , 15 . It is desired that the frictional forces are as large as possible so that a slipping of the sheet 5 can be effectively prevented and the sheet 5 runs through the transport path in an error-free manner, i.e. in correct orientation and position.
  • set cleaning rollers 40 are provided on the conveyor belts 10 , 15 .
  • one cleaning roller 40 is located above and one below the rollers 30 and deflection rollers 35 with the conveyor belts 10 , 15 .
  • the cleaning rollers 40 can have their own drive, but are preferably driven by the movement of the conveyor belts 10 , 15 . With the help of the cleaning rollers 40 , the surface coating 20 is cleaned during each revolution and its coefficient of friction is maintained.
  • the rollers 30 can be constructed as cleaning rollers.
  • the number of rollers 30 is reduced in the process in comparison to similar devices for conveying sheets 5 , since by the increased coefficients of friction between the sheet 5 and the conveyor belts 10 , 15 , a constant mechanical pressure by the rollers 30 is not necessary to ensure the safe transport in an error-free orientation without slipping or shifting of the sheet 5 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
US10/080,256 2001-03-17 2002-02-21 Device for conveying sheets Abandoned US20020130462A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10113005A DE10113005A1 (de) 2001-03-17 2001-03-17 Einrichtung zur Förderung von Bogen
DE10113005.8 2001-03-17

Publications (1)

Publication Number Publication Date
US20020130462A1 true US20020130462A1 (en) 2002-09-19

Family

ID=7677904

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/080,256 Abandoned US20020130462A1 (en) 2001-03-17 2002-02-21 Device for conveying sheets

Country Status (4)

Country Link
US (1) US20020130462A1 (ja)
EP (1) EP1241119B1 (ja)
JP (1) JP2002321846A (ja)
DE (2) DE10113005A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060283846A1 (en) * 2005-06-21 2006-12-21 Fameccanica.Data S.P.A., Sambuceto Di Method and advice for laser treatments, particularly for treating sanitary products and components thereof
US20070045950A1 (en) * 2005-08-26 2007-03-01 Dirk Dobrindt Device for depositing sheets for a printing machine
US20090013884A1 (en) * 2007-07-09 2009-01-15 Heidelberger Druckmaschinen Ag Sheet punching and embossing machine and method for orienting the sheets

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4654718B2 (ja) * 2005-03-16 2011-03-23 富士ゼロックス株式会社 画像記録体の作製装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6012437A (ja) * 1983-07-04 1985-01-22 Canon Inc シ−ト材の搬送装置
GB2170165A (en) * 1985-01-30 1986-07-30 Cubic Western Data Ticket transport mechanism
JPS6413340A (en) * 1987-07-02 1989-01-18 Nec Corp Wafer conveying device
JPH04140243A (ja) * 1990-09-28 1992-05-14 Toshiba Corp 紙葉類の搬送装置
JPH0623233A (ja) * 1992-07-07 1994-02-01 Babcock Hitachi Kk 排ガス処理装置
JPH06115751A (ja) * 1992-10-08 1994-04-26 Minolta Camera Co Ltd 原稿搬送ベルト
DE69421783T2 (de) * 1993-09-20 2000-07-06 Toshiba Kawasaki Kk Vorrichtung zur Kontrolle von bogenförmigen Materialien und Transportvorrichtung für diese
US5798181A (en) * 1994-10-04 1998-08-25 W. L. Gore & Associates, Inc. Fluoropolymer coated elastomeric rollers and structures
JP3399672B2 (ja) * 1994-11-16 2003-04-21 株式会社リコー 画像形成装置
JPH09156794A (ja) * 1995-12-15 1997-06-17 Tec Corp 用紙搬送用ベルトのクリーニング装置
JP3290114B2 (ja) * 1997-07-25 2002-06-10 北辰工業株式会社 紙葉類搬送用無端ベルト
JP2000191175A (ja) * 1998-12-25 2000-07-11 Sharp Corp 記録媒体搬送用ベルト装置およびそれを用いた記録装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060283846A1 (en) * 2005-06-21 2006-12-21 Fameccanica.Data S.P.A., Sambuceto Di Method and advice for laser treatments, particularly for treating sanitary products and components thereof
US7528343B2 (en) * 2005-06-21 2009-05-05 Fameccanica. Data S.P.A. Laser treatment of sanitary products
US20070045950A1 (en) * 2005-08-26 2007-03-01 Dirk Dobrindt Device for depositing sheets for a printing machine
US20090013884A1 (en) * 2007-07-09 2009-01-15 Heidelberger Druckmaschinen Ag Sheet punching and embossing machine and method for orienting the sheets

Also Published As

Publication number Publication date
EP1241119B1 (de) 2006-08-30
DE50207962D1 (de) 2006-10-12
JP2002321846A (ja) 2002-11-08
EP1241119A2 (de) 2002-09-18
DE10113005A1 (de) 2002-09-19
EP1241119A3 (de) 2004-02-04

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Legal Events

Date Code Title Description
AS Assignment

Owner name: NEXPRESS SOLUTIONS LLC, NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DOBRINDT, DIRK;REEL/FRAME:012917/0861

Effective date: 20020305

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION